Re: [patch 4/5] memcg: condense page_cgroup-to-page lookup points

[KAMEZAWA Hiroyuki]

On Thu,  3 Feb 2011 15:26:05 +0100
Johannes Weiner <hannes@xxxxxxxxxxx> wrote:

> The per-cgroup LRU lists string up 'struct page_cgroup's.  To get from
> those structures to the page they represent, a lookup is required.
> Currently, the lookup is done through a direct pointer in struct
> page_cgroup, so a lot of functions down the callchain do this lookup
> by themselves instead of receiving the page pointer from their
> callers.
> 
> The next patch removes this pointer, however, and the lookup is no
> longer that straight-forward.  In preparation for that, this patch
> only leaves the non-optional lookups when coming directly from the LRU
> list and passes the page down the stack.
> 
> Signed-off-by: Johannes Weiner <hannes@xxxxxxxxxxx>

Maybe good.

Acked-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@xxxxxxxxxxxxxx>



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